It's every parent's nightmare. Your teenager gets heavily involved in drugs, and you don't even know it's happening.
In the first of our new series from Fixers - the campaign that helps young people make a difference - we meet teenager Jade Clement who says cannabis nearly ruined her school career, and cut her off from family and friends.
With government figures showing that nearly a third of young people have tried cannabis, and new research suggesting it may damage teenagers' brains, she's warning that the drug is no joke.
More top news
Sunday's weather with Philippa
Philippa has the weekend weather update for the east
Philippa has the weekend weather update for the west